Blood, hematopoietic organs-immune system (D50-D90).
- Schönlein-Henoch purpura (age <20 years).
Genitourinary system (kidneys, urinary tract – reproductive organs) (N00-N99).
- Other forms of glomerulonephritis
- Benign familial hematuria (synonym: thin basement membrane nephropathy) – isolated, familial persistent glomerular hematuria (blood in the urine) and minimal proteinuria (excretion of protein in the urine) with normal renal function.
